I have brought this SIM from Chennai airport, while travelling abroad, once reached first day after so much troubleshooting with help of local carrier it worked, but after one day it said I didnt had sufficient balance even after I paid all in advance, They fraudulently charge my credit card for 700 again and 1500 on the time of activation, will never recommend to go for it.
It must be auto activate when I start it on intended place but didnt, had to spent lot of time to troubleshoot it, and finally I brought another SIM from abroad and paid extra for that as I has no option left.